Given a set of data, X={x
1, x
2, ..., x
n} and corresponding weights, W={w
1, w
2, ..., w
n} the weighted mean is calculated as
- Weighted mean = ( w1x1 + w2x2 + ... + wnxn ) / ( w1 + w2 + ... + wn )
Note that if all the weights are equal, the weighted mean is the same as the arithmetic mean.
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